翻訳と辞書 Words near each other ・ Back Where You Started ・ Back with a Bong ・ Back with a Heart ・ Back with a Vengeance ・ Back with Basie ・ Back with the Thugz ・ Back with the Thugz Part 2 ・ Back with Two Beasts ・ Back Yard Burgers ・ Back Yard Recordings ・ Back Young-chul ・ Back, Lewis ・ Back, Manitoba ・ Back-and-forth method ・ Back-arc basin ・ Back-arc region ・ Back-bond ・ Back-chaining ・ Back-end database ・ Back-face culling ・ Back-fire ・ Back-formation ・ Back-Fusion ・ Back-illuminated sensor ・ Back-of-the-envelope calculation ・ Back-off pattern ・ Back-On ・ Back-pass rule ・ Back-rank checkmate ・ Back-reaction Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Back-arc region ： ウィキペディア英語版 Back-arc region The back-arc region is the area behind a volcanic arc.〔Tectonics By Eldridge M. Moores, Robert J. Twiss (p.157 )〕 In island volcanic arcs it consists of back-arc basins of oceanic crust with abyssal depths, which may be separated by remnant arcs, similar to island arcs.〔 In continental arcs the back-arc region is part of continental platform, either dry land (subaerial) or forming shallow marine basins.〔 ==Formation== Back-arc deformation is a product of subduction at convergent plate tectonic boundaries. It initiates and evolves behind the volcanic arc on the overriding plate of a subduction zone. The stresses responsible for the deformation in this region of a subduction zone result from a combination of processes. The absolute motion of the upper plate as it moves towards or away from the trench strongly contributes to deformation in the back-arc region. 〔 Since the downgoing slab is partly anchored in the viscous layers of the mantle, and therefore its lateral movement is significantly slower than the surface plate, then any motion of the overriding plate will cause extensional or compressional stress in the back-arc region depending on the direction of motion. 〔 In addition, mantle convection in the upper mantle wedge caused by the downward movement of the subducted slab causes stress in the upper plate and the high heat flow that characterizes back-arcs. The pulling effect of the slab as it goes down into the mantle causes a rollback motion of the trench, which also applies stress on the back-arc region of the upper plate. 〔 However, this last process has less of an impact on deformation compared to upper plate motion. 〔 Back-arcs can form on either oceanic crust or continental crust. In the case of oceanic crust, most back-arc regions are subjected to tensional stresses and thus develop a spreading center where new oceanic crust is formed. The composition of this new crust is similar to MORB, although it contains higher amounts of water. 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Back-arc region」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.